gemifloxacin [ 7-(3-aminomethyl-4-methoxyimino-pyrrolidine-1-yl)-1-cyclopropyl-6-fluoro-4-oxo-1,4-dihydro-(1,8)-naphthyridine-3-carboxylic acid,Factive,LB 20304,LB-20304,LB20304,Oscient brand of gemifloxacin,SB 265805,SB-265805,gemifloxacin mesylate ] a fluoronaphthyridone; structure in first source